Vitrectomy probe with adjustable cutter port size
First Claim
Patent Images
1. A vitrectomy probe comprising:
- a housing;
a cutter extending longitudinally from a first end of the housing, the cutter comprising;
an outer cutting member coupled to the housing;
an inner cutting member slideable within the outer cutting member, the inner cutting member slideable between a retracted position and an extended position; and
an adjustable port, a size of the adjustable port defined by an edge of an opening formed in the outer cutting member and an end surface of the inner cutting member when the inner cutting member is in a fully retracted position;
an oscillator operable to reciprocate the inner cutting member;
a first chamber formed in the housing; and
a stroke limiter operable to limit the size of the adjustable port, the stroke limiter comprising;
a moveable element moveable relative to the inner cutting member, the moveable element moveable within the first chamber in response to a pneumatic pressure within a portion of the first chamber, the moveable element adapted to be positioned to engage the inner cutting member at a selected position defining the retracted position of the inner cutting member.
3 Assignments
0 Petitions
Accused Products
Abstract
Vitrectomy probes and system related thereto are disclosed herein. The disclosure describes various example vitrectomy probes having an adjustable cutting port size. Various example features are described for adjusting the size of the cutting port. Further, the disclosure provides examples for adjusting the size of the cutter port while the vitrectomy probe is in operation.
-
Citations
20 Claims
-
1. A vitrectomy probe comprising:
-
a housing; a cutter extending longitudinally from a first end of the housing, the cutter comprising; an outer cutting member coupled to the housing; an inner cutting member slideable within the outer cutting member, the inner cutting member slideable between a retracted position and an extended position; and an adjustable port, a size of the adjustable port defined by an edge of an opening formed in the outer cutting member and an end surface of the inner cutting member when the inner cutting member is in a fully retracted position; an oscillator operable to reciprocate the inner cutting member; a first chamber formed in the housing; and a stroke limiter operable to limit the size of the adjustable port, the stroke limiter comprising; a moveable element moveable relative to the inner cutting member, the moveable element moveable within the first chamber in response to a pneumatic pressure within a portion of the first chamber, the moveable element adapted to be positioned to engage the inner cutting member at a selected position defining the retracted position of the inner cutting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A vitrectomy probe comprising:
-
a housing; a cutter extending from a first end of the housing, the cutter comprising; a hollow outer cutting member coupled to the housing, the outer cutting member comprising an open end and a closed end; a hollow inner cutting member slideable within the outer cutting member, the inner cutting member comprising open opposing ends and a first cutting surface at a first end thereof; and an opening formed in the outer cutting member proximate an end thereof, the opening having a second cutting surface cooperative with the first cutting member to dissect materials that enter the opening, the opening and the first cutting surface defining a port, a size of the port defined by a location of the first cutting surface relative to the opening when the inner cutting member is in a fully retracted position; a first pneumatic chamber formed in the housing; a first diaphragm coupled to the inner cutting member and dividing the first pneumatic chamber into a first chamber portion and a second chamber portion, the first chamber portion in fluid communication with a first passageway and the second chamber portion in fluid communication with a second passageway, the first passageway and the second passageway adapted to transmit a first pneumatic pressure to the first chamber portion and the second chamber portion, respectively, in an alternating sequence to oscillate the first diaphragm and the inner cutting member between the fully retracted position and a fully extended position; a second pneumatic chamber formed in the housing; a second diaphragm dividing the second pneumatic chamber into a third chamber portion and a fourth chamber portion; a stroke limiter coupled to the second diaphragm and moveable therewith; and a third passageway in communication with the fourth chamber portion, the third passageway adapted to transmit a second pneumatic pressure to the fourth chamber portion to displace the second diaphragm an amount proportional to the second pneumatic pressure. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. A system comprising:
-
a vitrectomy probe comprising; a housing; a cutter extending from a first end of the housing, the cutter comprising; a hollow outer cutting member coupled to the housing, the outer cutting member comprising an open end and a closed end; a hollow inner cutting member slideable within the outer cutting member, the inner cutting member comprising open opposing ends and a first cutting surface at a first end thereof; and an opening formed in the outer cutting member proximate an end thereof, the opening having a second cutting surface cooperative with the first cutting member to dissect materials that enter the opening, the opening and the first cutting surface defining a port, a size of the port defined by a location of the first cutting surface relative to the opening when the inner cutting member is in a fully retracted position; a first pneumatic chamber formed in the housing; a first diaphragm dividing the first pneumatic chamber into a first chamber portion and a second chamber portion; a stroke limiter coupled to the first diaphragm and moveable therewith, the stroke limiter moveable relative to the hollow inner cutting member, the stroke limiter adapted to limit a retracted position of the inner cutting member, the limited retracted position of the inner cutting member defining the fully retracted position; a first passageway in communication with the first chamber portion, the first passageway adapted to transmit a first pneumatic pressure to the second chamber portion to displace the first diaphragm an amount proportional to the first pneumatic pressure; and an oscillator coupled to the inner cutting member and adapted to oscillate the cutter between the fully retracted position and the fully extended position; a surgical console pneumatically coupled to the first passageway of the vitrectomy probe and adapted to alter the first pneumatic pressure supplied to the vitrectomy probe based on a user input; and an input device coupled to the console, the input device adapted to receive the user input and cause the console to alter the first pneumatic pressure supplied to the vitrectomy probe thereby altering the size of the port of the cutter. - View Dependent Claims (20)
-
Specification